What I think is kind of bad is the fact that these folks charge money for this! It would take about an hour to set up something in either Access or Excel that would do the same job as these pay-for kits. Maybe Ill do that and offer it up for free....no promises! I can tinker with it some.
So, with that in mind, this question is for you gigantic stash hoarders.... :-) .... What categories do you need to track? Obviously, I see:
Manufacturer
Scale
Type (armor, aircraft, car, figures etc.)
Cost
Location of kit (basement, closet, etc.)
Date purchased/traded/located
consignments
Add ons (aftermarket tracks, PE etc.)
Build date start/finish
Maybe a running cost of additional purchases for a kit? I know Ive spent way more on aftermarket stuff for the kit I'm working on than I paid for the kit LOL!